WASET
    O. S. Eludoyin and  A. A. Aiyeloja and  O. C. Ndife,  Spatial Analysis of Trees Composition, Diversity and Richnesss in the Built up Areas of University of Port Harcourt, Nigeria.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2014, vol. 86(2). 142 - 146
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/9998116.